X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Drops Under Paraffin Oil
pH 4.7
Temperature 291.0
Details A SOLUTION CONTAINING 40 MG/ML OF LYSOZYME (SIGMA L-6876, BATCH NUMBER, LOT 65H7025, IE A DIFFERENT SIGMA SAMPLE TO THE EXPERIMENTS DESCRIBED ABOVE) IN 10 MM SODIUM CITRATE BUFFER PH 4.7 WAS MIXED IN AN EPPENDORF TUBE WITH EQUAL VOLUMES OF 12 % SODIUM CHLORIDE (BDH). THE MIXTURE WAS FILTERED THROUGH A 0.22 UM FILTER AND 8 UL DROPS WERE MANUALLY DISPENSED UNDER PARAFFIN OIL USING A GILSON MICRO PIPPETTE. OVER 20 IDENTICAL DROPS WERE SET UP AND, WITHIN A WEEK, SINGLE CRYSTALS TYPICALLY MEASURING 0.5 X 0.4 X 0.3 MM WERE OBTAINED IN MOST OF THE DROPS. CRYSTALLISATION TOOK PLACE AT A TEMPERATURE OF 18 - 20 C., drops under paraffin oil, temperature 291K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 79.23 α = 90
b = 79.23 β = 90
c = 37.94 γ = 90
Symmetry
Space Group P 43 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 293
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE RIGAKU RAXIS IIC -- --
Diffraction Radiation
Monochromator Protocol
CARBON SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RU200 -- -- --

Data Collection

Overall
Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) R Sym I (Observed) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot
1.7 99 85.5 0.077 0.08 -- 6.1 -- 12081 -- -- --

Refinement

Statistics
Structure Solution Method Refinement High Resolution Refinement Low Resolution Cut-off Sigma (I) Cut-off Sigma (F) Number of Reflections (All) Number of Reflections (Observed) Number of Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work R-Free R-Free Selection Details
MOLECULAR REPLACEMENT 1.8 20.0 -- 0.0 -- 10979 -- 94.1 -- 0.171 0.171 0.206 RANDOM
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 22.9
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 1.216
x_bond_d 0.007
x_angle_deg 1.579
x_dihedral_angle_d 22.2
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1001
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 92

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
X-PLOR 3.1 Structure Refinement
Software
Software Name Purpose
X-PLOR version: 3.1 refinement
SCALEPACK data reduction
DENZO data collection